Add show disconnected button to admin player tab (#15326)

Content.Client/Administration/UI/Tabs/PlayerTab/PlayerTab.xaml.cs

@@ -1,3 +1,4 @@
+using System.Linq;
 using Content.Client.Administration.Systems;
 using Content.Shared.Administration;
 using Robust.Client.AutoGenerated;
@@ -18,10 +19,11 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
         private readonly Color _altColor = Color.FromHex("#292B38");
         private readonly Color _defaultColor = Color.FromHex("#2F2F3B");
         private readonly AdminSystem _adminSystem;
-        private readonly List<PlayerTabEntry> _players = new();
+        private IReadOnlyList<PlayerInfo> _players = new List<PlayerInfo>();
 
         private Header _headerClicked = Header.Username;
         private bool _ascending = true;
+        private bool _showDisconnected;
 
         public event Action<ButtonEventArgs>? OnEntryPressed;
 
@@ -36,6 +38,7 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
             _adminSystem.OverlayDisabled += OverlayDisabled;
 
             OverlayButton.OnPressed += OverlayButtonPressed;
+            ShowDisconnectedButton.OnPressed += ShowDisconnectedPressed;
 
             ListHeader.BackgroundColorPanel.PanelOverride = new StyleBoxFlat(_altColor);
             ListHeader.OnHeaderClicked += HeaderClicked;
@@ -63,6 +66,12 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
             }
         }
 
+        private void ShowDisconnectedPressed(ButtonEventArgs args)
+        {
+            _showDisconnected = args.Button.Pressed;
+            RefreshPlayerList(_players);
+        }
+
         protected override void Dispose(bool disposing)
         {
             base.Dispose(disposing);
@@ -81,12 +90,13 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
 
         private void RefreshPlayerList(IReadOnlyList<PlayerInfo> players)
         {
-            foreach (var control in _players)
+            foreach (var child in PlayerList.Children.ToArray())
             {
-                PlayerList.RemoveChild(control);
+                if (child is PlayerTabEntry)
+                    child.Orphan();
             }
 
-            _players.Clear();
+            _players = players;
 
             var playerManager = IoCManager.Resolve<IPlayerManager>();
             PlayerCount.Text = $"Players: {playerManager.PlayerCount}";
@@ -99,6 +109,9 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
             var useAltColor = false;
             foreach (var player in sortedPlayers)
             {
+                if (!_showDisconnected && !player.Connected)
+                    continue;
+
                 var entry = new PlayerTabEntry(player.Username,
                     player.CharacterName,
                     player.IdentityName,
@@ -109,7 +122,6 @@ namespace Content.Client.Administration.UI.Tabs.PlayerTab
                 entry.PlayerUid = player.EntityUid;
                 entry.OnPressed += args => OnEntryPressed?.Invoke(args);
                 PlayerList.AddChild(entry);
-                _players.Add(entry);
 
                 useAltColor ^= true;
             }